LOCAL ENTANGLEMENT ENTROPY AT THE MOTT METAL-INSULATOR TRANSITION IN INFINITE DIMENSIONS

被引：7

作者：

Su, Dan-Dan ^{[1
]}

Dai, Xi ^{[2
]}

Tong, Ning-Hua ^{[1
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

MODERN PHYSICS LETTERS B | 2013年 / 27卷 / 05期

关键词：

Hubbard model; metal-insulator transitions; entanglement entropy; QUANTUM PHASE-TRANSITION; MEAN-FIELD THEORY; FERMIONS; SYSTEMS;

D O I：

10.1142/S0217984913500346

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the critical behavior of the single-site entanglement entropy S at the Mott metal-insulator transition in infinite-dimensional Hubbard model. For this model, the entanglement between a single site and rest of the lattice can be evaluated exactly, using the dynamical mean-field theory (DMFT). Both the numerical solution using exact diagonalization and the analytical one using two-site DMFT gives S-S-c proportional to alpha log(2)[(1/2-D-c)/D-c](U - U-c), with D-c the double occupancy at U-c and alpha < 0 being different on two sides of the transition.

引用

页数：10

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